Package: gstreamer0.10-alsa
Version: 0.10.12-2
Severity: normal
Tags: patch
Hi,
As discussed on IRC, mixer_applet2 wakes up every 200ms or so, possibly
reducing laptop battery life. The included patch (taken from Ubuntu,
which in turn got it from upstream Bugzilla, AFAIK) makes gstreamer
listen to the ALSA notifications, which is the "bottom" half of the
solution.
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1,
'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.22-rc1 (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=nb_NO.UTF-8, LC_CTYPE=nb_NO.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages gstreamer0.10-alsa depends on:
ii libasound2 1.0.13-2 ALSA library
ii libc6 2.5-7 GNU C Library: Shared libraries
ii libglib2.0-0 2.12.12-1 The GLib library of C routines
ii libgstreamer-plugins-base0 0.10.12-2 GStreamer libraries from the "base
ii libgstreamer0.10-0 0.10.12-5 Core GStreamer libraries and eleme
ii libxml2 2.6.28.dfsg-1 GNOME XML library
gstreamer0.10-alsa recommends no packages.
-- no debconf information
diff --git a/ext/alsa/gstalsamixer.c b/ext/alsa/gstalsamixer.c
index 931d98f..cd7ccbf 100644
--- a/ext/alsa/gstalsamixer.c
+++ b/ext/alsa/gstalsamixer.c
@@ -42,6 +42,81 @@
#include "gstalsamixer.h"
+static void gst_alsa_mixer_update_option (GstAlsaMixer * mixer, GstAlsaMixerOptions * alsa_opts);
+static void gst_alsa_mixer_update_track (GstAlsaMixer * mixer, GstAlsaMixerTrack * alsa_track);
+
+static gboolean gst_alsa_mixer_prepare (GSource * source, gint * timeout);
+static gboolean gst_alsa_mixer_check (GSource * source);
+static gboolean gst_alsa_mixer_dispatch (GSource * source, GSourceFunc callback, gpointer user_data);
+static void gst_alsa_mixer_finalize (GSource * source);
+
+static GMainContext *main_context;
+
+typedef struct _GstAlsaMixerWatch GstAlsaMixerWatch;
+struct _GstAlsaMixerWatch
+{
+ GSource source;
+ gint n_poll_fds;
+ GPollFD * poll_fds;
+};
+
+GSourceFuncs gst_alsa_mixer_watch_funcs = {
+ gst_alsa_mixer_prepare,
+ gst_alsa_mixer_check,
+ gst_alsa_mixer_dispatch,
+ gst_alsa_mixer_finalize
+};
+
+static gboolean
+gst_alsa_mixer_prepare (GSource * source, gint * timeout)
+{
+ *timeout = -1;
+ return FALSE;
+}
+
+static gboolean
+gst_alsa_mixer_check (GSource * source)
+{
+ GstAlsaMixerWatch *watch = (GstAlsaMixerWatch *)source;
+ gint i;
+ gushort revents;
+
+ /* Code based on snd_mixer_poll_descriptors_revents() adapted for glib */
+ revents = 0;
+ for (i = 0; i < watch->n_poll_fds; ++i) {
+ revents |= watch->poll_fds[i].revents & (G_IO_IN|G_IO_ERR|G_IO_HUP);
+ }
+
+ if (revents & G_IO_ERR || revents & G_IO_HUP) {
+ GST_WARNING ("ALSA poll fds returned ERR or HUP");
+ return FALSE;
+ }
+
+ return (revents & G_IO_IN);
+}
+
+static gboolean
+gst_alsa_mixer_dispatch (GSource * source, GSourceFunc callback, gpointer user_data)
+{
+ if (!callback) {
+ GST_WARNING ("Cannot get callback from ALSA mixer watcher");
+ }
+
+ return (*callback) (user_data);
+}
+
+static void
+gst_alsa_mixer_finalize (GSource * source)
+{
+ GstAlsaMixerWatch *watch = (GstAlsaMixerWatch *)source;
+
+ if (watch->poll_fds != NULL) {
+ g_free (watch->poll_fds);
+ watch->poll_fds = NULL;
+ }
+
+ watch->n_poll_fds = 0;
+}
/* First some utils, then the mixer implementation */
static gboolean
@@ -169,11 +244,72 @@ gst_alsa_mixer_find_master_mixer (GstAlsaMixer * mixer, snd_mixer_t * handle)
return NULL;
}
+static gboolean
+gst_alsa_mixer_handle_source_callback (gpointer data)
+{
+ GstAlsaMixer *mixer = (GstAlsaMixer *)data;
+
+ GST_WARNING ("Source cb");
+ snd_mixer_handle_events (mixer->handle);
+
+ return TRUE;
+}
+
+static int
+gst_alsa_mixer_handle_callback (snd_mixer_t *handle, unsigned int mask, snd_mixer_elem_t *elem)
+{
+ GstAlsaMixer *mixer = (GstAlsaMixer *)snd_mixer_get_callback_private (handle);
+ GList *item;
+
+ GST_WARNING ("ALSA cb");
+ snd_mixer_handle_events (mixer->handle);
+
+ for (item = mixer->tracklist; item != NULL; item = item->next) {
+ if (GST_IS_ALSA_MIXER_TRACK (item->data)) {
+ GstAlsaMixerTrack *item_alsa_track = GST_ALSA_MIXER_TRACK (item->data);
+ gst_alsa_mixer_update_track (mixer, item_alsa_track);
+ } else {
+ GstAlsaMixerOptions *item_alsa_options = GST_ALSA_MIXER_OPTIONS (item->data);
+ gst_alsa_mixer_update_option (mixer, item_alsa_options);
+ }
+ }
+
+ return 0;
+}
+
+int
+gst_alsa_mixer_elem_handle_callback (snd_mixer_elem_t *elem, unsigned int mask)
+{
+ GstAlsaMixer *mixer = (GstAlsaMixer *)snd_mixer_elem_get_callback_private (elem);
+ GList *item;
+
+ GST_WARNING ("ALSA elem cb");
+
+ for (item = mixer->tracklist; item != NULL; item = item->next) {
+ if (GST_IS_ALSA_MIXER_TRACK (item->data)) {
+ if (GST_ALSA_MIXER_TRACK (item->data)->element != elem)
+ continue;
+
+ gst_alsa_mixer_update_track (mixer, GST_ALSA_MIXER_TRACK (item->data));
+ } else if (GST_IS_ALSA_MIXER_OPTIONS (item->data)) {
+ if (GST_ALSA_MIXER_OPTIONS (item->data)->element != elem)
+ continue;
+
+ gst_alsa_mixer_update_option (mixer, GST_ALSA_MIXER_OPTIONS (item->data));
+ }
+ }
+
+ return 0;
+}
+
static void
gst_alsa_mixer_ensure_track_list (GstAlsaMixer * mixer)
{
gint i, count;
snd_mixer_elem_t *element, *master;
+ struct pollfd *pfds;
+ GstAlsaMixerWatch *watch;
+ GList *item;
g_return_if_fail (mixer->handle != NULL);
@@ -190,12 +326,11 @@ gst_alsa_mixer_ensure_track_list (GstAlsaMixer * mixer)
* Some ALSA tracks may have playback and capture capabilities.
* Here we model them as two separate GStreamer tracks.
*/
-
+
for (i = 0; i < count; i++) {
GstMixerTrack *play_track = NULL;
GstMixerTrack *cap_track = NULL;
const gchar *name;
- GList *item;
gint samename = 0;
name = snd_mixer_selem_get_name (element);
@@ -287,6 +422,58 @@ gst_alsa_mixer_ensure_track_list (GstAlsaMixer * mixer)
element = snd_mixer_elem_next (element);
}
+
+ if (mixer->handle_source != NULL)
+ return;
+
+ snd_mixer_set_callback_private (mixer->handle, mixer);
+ snd_mixer_set_callback (mixer->handle, gst_alsa_mixer_handle_callback);
+
+ main_context = g_main_context_default ();
+
+ mixer->handle_source = g_source_new (&gst_alsa_mixer_watch_funcs, sizeof (GstAlsaMixerWatch));
+ g_return_if_fail (main_context != NULL && mixer->handle_source != NULL);
+
+ watch = (GstAlsaMixerWatch *)mixer->handle_source;
+
+ count = snd_mixer_poll_descriptors_count (mixer->handle);
+
+ pfds = g_newa (struct pollfd, count);
+
+ watch->n_poll_fds = snd_mixer_poll_descriptors (mixer->handle, pfds, count);;
+ watch->poll_fds = g_new0 (GPollFD, count);
+ if (watch->poll_fds == NULL) {
+ GST_WARNING ("Cannot allocate poll descriptors");
+ g_source_destroy (mixer->handle_source);
+ mixer->handle_source = NULL;
+ return;
+ }
+
+ for (i = 0; i < watch->n_poll_fds; ++i) {
+ watch->poll_fds[i].fd = pfds[i].fd;
+
+ if (pfds[i].events & POLLIN) watch->poll_fds[i].events |= G_IO_IN;
+ if (pfds[i].events & POLLOUT) watch->poll_fds[i].events |= G_IO_OUT;
+ if (pfds[i].events & POLLPRI) watch->poll_fds[i].events |= G_IO_PRI;
+
+ g_source_add_poll (mixer->handle_source, &watch->poll_fds[i]);
+ }
+
+ /* FIXME mixer has to be protected, since cb could be made from different thread ? */
+ g_source_set_callback (mixer->handle_source, gst_alsa_mixer_handle_source_callback, mixer, NULL);
+ g_source_attach (mixer->handle_source, main_context);
+
+ for (item = mixer->tracklist; item != NULL; item = item->next) {
+ snd_mixer_elem_t *temp;
+
+ if (GST_IS_ALSA_MIXER_OPTIONS (item->data))
+ temp = GST_ALSA_MIXER_OPTIONS (item->data)->element;
+ else
+ temp = GST_ALSA_MIXER_TRACK (item->data)->element;
+
+ snd_mixer_elem_set_callback (temp, gst_alsa_mixer_elem_handle_callback);
+ snd_mixer_elem_set_callback_private (temp, mixer);
+ }
}
@@ -303,7 +490,7 @@ gst_alsa_mixer_new (const char *device, GstAlsaMixerDirection dir)
ret->device = g_strdup (device);
ret->dir = dir;
-
+
if (!gst_alsa_mixer_open (ret))
goto error;
@@ -322,6 +509,16 @@ gst_alsa_mixer_free (GstAlsaMixer * mixer)
{
g_return_if_fail (mixer != NULL);
+ if (mixer->this) {
+ g_object_unref (G_OBJECT (mixer->this));
+ mixer->this = NULL;
+ }
+
+ if (mixer->handle_source) {
+ g_source_destroy (mixer->handle_source);
+ mixer->handle_source = NULL;
+ }
+
if (mixer->device) {
g_free (mixer->device);
mixer->device = NULL;
@@ -356,16 +553,6 @@ gst_alsa_mixer_list_tracks (GstAlsaMixer * mixer)
return (const GList *) mixer->tracklist;
}
-static void
-gst_alsa_mixer_update (GstAlsaMixer * mixer, GstAlsaMixerTrack * alsa_track)
-{
- snd_mixer_handle_events (mixer->handle);
-
- if (alsa_track)
- gst_alsa_mixer_track_update (alsa_track);
-}
-
-
void
gst_alsa_mixer_get_volume (GstAlsaMixer * mixer, GstMixerTrack * track,
gint * volumes)
@@ -375,7 +562,7 @@ gst_alsa_mixer_get_volume (GstAlsaMixer * mixer, GstMixerTrack * track,
g_return_if_fail (mixer->handle != NULL);
- gst_alsa_mixer_update (mixer, alsa_track);
+ gst_alsa_mixer_track_update (alsa_track);
if (track->flags & GST_MIXER_TRACK_OUTPUT) { /* return playback volume */
@@ -420,7 +607,7 @@ gst_alsa_mixer_set_volume (GstAlsaMixer * mixer, GstMixerTrack * track,
g_return_if_fail (mixer->handle != NULL);
- gst_alsa_mixer_update (mixer, alsa_track);
+ gst_alsa_mixer_track_update (alsa_track);
if (track->flags & GST_MIXER_TRACK_OUTPUT) {
@@ -461,7 +648,7 @@ gst_alsa_mixer_set_mute (GstAlsaMixer * mixer, GstMixerTrack * track,
g_return_if_fail (mixer->handle != NULL);
- gst_alsa_mixer_update (mixer, alsa_track);
+ gst_alsa_mixer_track_update (alsa_track);
if (!!(mute) == !!(track->flags & GST_MIXER_TRACK_MUTE))
return;
@@ -509,7 +696,7 @@ gst_alsa_mixer_set_record (GstAlsaMixer * mixer,
g_return_if_fail (mixer->handle != NULL);
- gst_alsa_mixer_update (mixer, alsa_track);
+ gst_alsa_mixer_track_update (alsa_track);
if (!!(record) == !!(track->flags & GST_MIXER_TRACK_RECORD))
return;
@@ -536,7 +723,7 @@ gst_alsa_mixer_set_record (GstAlsaMixer * mixer,
if (item_alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH_EXCL &&
item_alsa_track->capture_group == alsa_track->capture_group) {
- gst_alsa_mixer_update (mixer, item_alsa_track);
+ gst_alsa_mixer_track_update (item_alsa_track);
}
}
}
@@ -562,8 +749,6 @@ gst_alsa_mixer_set_option (GstAlsaMixer * mixer,
g_return_if_fail (mixer->handle != NULL);
- gst_alsa_mixer_update (mixer, NULL);
-
for (item = opts->values; item != NULL; item = item->next, n++) {
if (!strcmp (item->data, value)) {
idx = n;
@@ -585,11 +770,54 @@ gst_alsa_mixer_get_option (GstAlsaMixer * mixer, GstMixerOptions * opts)
g_return_val_if_fail (mixer->handle != NULL, NULL);
- gst_alsa_mixer_update (mixer, NULL);
-
ret = snd_mixer_selem_get_enum_item (alsa_opts->element, 0, &idx);
if (ret == 0)
return g_list_nth_data (opts->values, idx);
else
return snd_strerror (ret); /* feeble attempt at error handling */
}
+
+static void
+gst_alsa_mixer_update_option (GstAlsaMixer * mixer, GstAlsaMixerOptions * alsa_opts)
+{
+ gint ret;
+ guint idx;
+ const gchar *option;
+
+ if (mixer->this == NULL) {
+ GST_WARNING ("Cannot send update notifications, no GstMixer * given");
+ return;
+ }
+
+ ret = snd_mixer_selem_get_enum_item (alsa_opts->element, 0, &idx);
+ if (ret == 0) {
+ option = g_list_nth_data (GST_MIXER_OPTIONS (alsa_opts)->values, idx);
+ gst_mixer_option_changed (mixer->this, GST_MIXER_OPTIONS (alsa_opts), option);
+ }
+}
+
+static void
+gst_alsa_mixer_update_track (GstAlsaMixer * mixer, GstAlsaMixerTrack * alsa_track)
+{
+ GstMixerTrack *track = (GstMixerTrack *) alsa_track;
+
+ if (mixer->this == NULL) {
+ GST_WARNING ("Cannot send update notifications, no GstMixer * given");
+ return;
+ }
+
+ gst_alsa_mixer_track_update (alsa_track);
+
+ gst_mixer_record_toggled (mixer->this, track, GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD));
+ gst_mixer_mute_toggled (mixer->this, track, GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_MUTE));
+ gst_mixer_volume_changed (mixer->this, track, alsa_track->volumes);
+}
+
+void
+gst_alsa_mixer_set_this (GstAlsaMixer * mixer, GstMixer * this)
+{
+ g_return_if_fail (mixer != NULL && mixer->this == NULL);
+ g_return_if_fail (this != NULL);
+
+ mixer->this = g_object_ref (G_OBJECT (this));
+}
diff --git a/ext/alsa/gstalsamixer.h b/ext/alsa/gstalsamixer.h
index 6c9eb1e..6208a1c 100644
--- a/ext/alsa/gstalsamixer.h
+++ b/ext/alsa/gstalsamixer.h
@@ -51,7 +51,9 @@ struct _GstAlsaMixer
GList * tracklist; /* list of available tracks */
snd_mixer_t * handle;
+ GSource * handle_source;
+ GstMixer * this;
gchar * device;
gchar * cardname;
@@ -61,6 +63,8 @@ struct _GstAlsaMixer
GstAlsaMixer* gst_alsa_mixer_new (const gchar *device,
GstAlsaMixerDirection dir);
+void gst_alsa_mixer_set_this (GstAlsaMixer *mixer,
+ GstMixer * this);
void gst_alsa_mixer_free (GstAlsaMixer *mixer);
const GList* gst_alsa_mixer_list_tracks (GstAlsaMixer * mixer);
@@ -82,7 +86,6 @@ void gst_alsa_mixer_set_option (GstAlsaMixer * mixer,
const gchar* gst_alsa_mixer_get_option (GstAlsaMixer * mixer,
GstMixerOptions * opts);
-
#define GST_IMPLEMENT_ALSA_MIXER_METHODS(Type, interface_as_function) \
static gboolean \
interface_as_function ## _supported (Type *this, GType iface_type) \
diff --git a/ext/alsa/gstalsamixerelement.c b/ext/alsa/gstalsamixerelement.c
index 75d5b4a..0c76376 100644
--- a/ext/alsa/gstalsamixerelement.c
+++ b/ext/alsa/gstalsamixerelement.c
@@ -44,23 +44,23 @@ GST_ELEMENT_DETAILS ("Alsa mixer",
static void gst_alsa_mixer_element_init_interfaces (GType type);
GST_BOILERPLATE_FULL (GstAlsaMixerElement, gst_alsa_mixer_element,
- GstElement, GST_TYPE_ELEMENT, gst_alsa_mixer_element_init_interfaces)
+ GstElement, GST_TYPE_ELEMENT, gst_alsa_mixer_element_init_interfaces);
/* massive macro that takes care of all the GstMixer stuff */
- GST_IMPLEMENT_ALSA_MIXER_METHODS (GstAlsaMixerElement, gst_alsa_mixer_element);
+GST_IMPLEMENT_ALSA_MIXER_METHODS (GstAlsaMixerElement, gst_alsa_mixer_element);
- static void gst_alsa_mixer_element_get_property (GObject * object,
- guint prop_id, GValue * value, GParamSpec * pspec);
- static void gst_alsa_mixer_element_set_property (GObject * object,
- guint prop_id, const GValue * value, GParamSpec * pspec);
- static void gst_alsa_mixer_element_finalize (GObject * object);
+static void gst_alsa_mixer_element_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+static void gst_alsa_mixer_element_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_alsa_mixer_element_finalize (GObject * object);
- static GstStateChangeReturn gst_alsa_mixer_element_change_state (GstElement
- * element, GstStateChange transition);
+static GstStateChangeReturn gst_alsa_mixer_element_change_state (GstElement
+ * element, GstStateChange transition);
- static gboolean
- gst_alsa_mixer_element_interface_supported (GstAlsaMixerElement * this,
- GType interface_type)
+static gboolean
+gst_alsa_mixer_element_interface_supported (GstAlsaMixerElement * this,
+ GType interface_type)
{
if (interface_type == GST_TYPE_MIXER) {
return gst_alsa_mixer_element_supported (this, interface_type);
@@ -214,6 +214,7 @@ gst_alsa_mixer_element_change_state (GstElement * element,
this->mixer = gst_alsa_mixer_new (this->device, GST_ALSA_MIXER_ALL);
if (!this->mixer)
goto open_failed;
+ gst_alsa_mixer_set_this (this->mixer, GST_MIXER (element));
}
break;
default:
diff --git a/ext/alsa/gstalsamixertrack.c b/ext/alsa/gstalsamixertrack.c
index d7b8a93..76a5852 100644
--- a/ext/alsa/gstalsamixertrack.c
+++ b/ext/alsa/gstalsamixertrack.c
@@ -239,6 +239,26 @@ gst_alsa_mixer_track_update (GstAlsaMixerTrack * alsa_track)
gint i;
gint audible = !(track->flags & GST_MIXER_TRACK_MUTE);
+ if (alsa_track_has_cap (alsa_track, GST_ALSA_MIXER_TRACK_PVOLUME)) {
+ /* update playback volume */
+ for (i = 0; i < track->num_channels; i++) {
+ long vol = 0;
+
+ snd_mixer_selem_get_playback_volume (alsa_track->element, i, &vol);
+ alsa_track->volumes[i] = (gint) vol;
+ }
+ }
+
+ if (alsa_track_has_cap (alsa_track, GST_ALSA_MIXER_TRACK_CVOLUME)) {
+ /* update capture volume */
+ for (i = 0; i < track->num_channels; i++) {
+ long vol = 0;
+
+ snd_mixer_selem_get_capture_volume (alsa_track->element, i, &vol);
+ alsa_track->volumes[i] = (gint) vol;
+ }
+ }
+
/* Any updates in flags? */
if (alsa_track_has_cap (alsa_track, GST_ALSA_MIXER_TRACK_PSWITCH)) {
int v = 0;
@@ -260,7 +280,7 @@ gst_alsa_mixer_track_update (GstAlsaMixerTrack * alsa_track)
if (vol > track->min_volume) {
audible = 1;
- break;
+ break;
}
}
}
@@ -304,7 +324,7 @@ gst_alsa_mixer_track_update (GstAlsaMixerTrack * alsa_track)
if (vol > track->min_volume) {
recording = 1;
- break;
+ break;
}
}
}
diff --git a/gst-libs/gst/interfaces/mixer.c b/gst-libs/gst/interfaces/mixer.c
index 116bab2..6058b9f 100644
--- a/gst-libs/gst/interfaces/mixer.c
+++ b/gst-libs/gst/interfaces/mixer.c
@@ -340,7 +340,7 @@ gst_mixer_record_toggled (GstMixer * mixer,
void
gst_mixer_volume_changed (GstMixer * mixer,
- GstMixerTrack * track, gint * volumes)
+ GstMixerTrack * track, const gint * volumes)
{
g_return_if_fail (mixer != NULL);
g_return_if_fail (track != NULL);
@@ -353,7 +353,7 @@ gst_mixer_volume_changed (GstMixer * mixer,
void
gst_mixer_option_changed (GstMixer * mixer,
- GstMixerOptions * opts, gchar * value)
+ GstMixerOptions * opts, const gchar * value)
{
g_return_if_fail (mixer != NULL);
g_return_if_fail (opts != NULL);
@@ -361,5 +361,5 @@ gst_mixer_option_changed (GstMixer * mixer,
g_signal_emit (G_OBJECT (mixer),
gst_mixer_signals[SIGNAL_OPTION_CHANGED], 0, opts, value);
- g_signal_emit_by_name (G_OBJECT (opts), "value_changed", value);
+ g_signal_emit_by_name (G_OBJECT (opts), "option_changed", value);
}
diff --git a/gst-libs/gst/interfaces/mixer.h b/gst-libs/gst/interfaces/mixer.h
index dde73ab..28c5f11 100644
--- a/gst-libs/gst/interfaces/mixer.h
+++ b/gst-libs/gst/interfaces/mixer.h
@@ -74,6 +74,11 @@ struct _GstMixerClass {
void (* set_record) (GstMixer *mixer,
GstMixerTrack *track,
gboolean record);
+ void (* set_option) (GstMixer *mixer,
+ GstMixerOptions *opts,
+ gchar *value);
+ const gchar * (* get_option) (GstMixer *mixer,
+ GstMixerOptions *opts);
/* signals */
void (* mute_toggled) (GstMixer *mixer,
@@ -84,17 +89,11 @@ struct _GstMixerClass {
gboolean record);
void (* volume_changed) (GstMixer *mixer,
GstMixerTrack *channel,
- gint *volumes);
-
- void (* set_option) (GstMixer *mixer,
- GstMixerOptions *opts,
- gchar *value);
- const gchar * (* get_option) (GstMixer *mixer,
- GstMixerOptions *opts);
+ const gint *volumes);
void (* option_changed) (GstMixer *mixer,
GstMixerOptions *opts,
- gchar *option);
+ const gchar *option);
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
@@ -131,10 +130,10 @@ void gst_mixer_record_toggled (GstMixer *mixer,
gboolean record);
void gst_mixer_volume_changed (GstMixer *mixer,
GstMixerTrack *track,
- gint *volumes);
+ const gint *volumes);
void gst_mixer_option_changed (GstMixer *mixer,
GstMixerOptions *opts,
- gchar *value);
+ const gchar *value);
G_END_DECLS
